The SureFire LED conversion head replaces the original incandescent or LED reflector-type head and battery housing of SureFire 600-series and 900-series dedicated forend WeaponLights for shotguns, rifles, and submachine guns. The result is an extremely compact head/housing unit, powered by one 123A lithium battery, that generates 100 lumens of brilliant white from a virtually indestructible LED emitter. Also serves as a replacement part for 300-series dedicated forend WeaponLights that originally came with the same head. The LM1 features a TIR lens that produces a more concentrated, farther-reaching beam for close- to mid-range engagements. Provides a tactical runtime (runtime until output drops below 50 lumens) of 1.4 hours per battery, with gradually decreasing output afterward. Constructed of aerospace aluminum with a Mil-Spec hard-anodized finish in Olive Drab Green, the LM1 is O-ring sealed for reliable operation in all weather conditions.